Holy Crap!!!! My 5 year old nephew just read the OP and has come to the conclusion WTC Dust is out of her mind.
Are we really still talking about a sample that was "discovered" 7 years after the fact? Debris that sat in a nice pile for 7 years, exposed to the elements, in the middle of Downtown Manhattan?
Sorry Dusty, until you provide evidence that the dust is physically from the twin towers it is not viable as a sample and any testing conducted on that dust is simply invalid. Period, end of story there is nothing left to say and no reason why this thread should go any further, until she can prove the dust is undeniably from the Towers and sat there for 7 years undisturbed any further conversation is a waste of breath.
Gee whiz you no planers are flat out nuts. Seek Help, please.